Table 3 Non-occupational exposure of silica dust near various industries [20]
Industry | Location | PM10 quartz conc. (µg/m3) | Mean quartz content |
|---|---|---|---|
Sand quarry | Exposed (vicinity) | 1.22 | 6–7 |
Slate pencil industry | Exposed (vicinity) Control (away) | 49.15 (10) 3.51 (5) | 15–18.79 2.91 |
Agate industry | Exposed (vicinity) Control (away) | 15.28 (20) 3.03 (14) | 5.61 1.87 |